Fill the grid with the letters A, B, C and D. Each row and column has exactly one of each letter digit and 2 empty cells. The clues along the edges tell you which digit you can see from that vantage point.
Fill the grid with the letters A, B and C. Each row and column has exactly one of each letter digit and 2 empty cells. The clues along the edges tell you which digit you can see from that vantage point.
Fill the grid with the letters A, B and C. Each row and column has exactly one of each letter digit and 2 empty cells. The clues along the edges tell you which digit you can see from that vantage point.